[   11.693631][   T68] ==================================================================
[   11.693953][   T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40
[   11.694256][   T68] Read of size 8 at addr ffff88800bcc00f8 by task kworker/u16:1/68
[   11.694490][   T68] 
[   11.694582][   T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1
[   11.694856][   T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.695089][   T68] Workqueue: netns cleanup_net
[   11.695304][   T68] Call Trace:
[   11.695456][   T68]  <TASK>
[   11.695563][   T68]  dump_stack_lvl+0x82/0xd0
[   11.695771][   T68]  print_address_description.constprop.0+0x2c/0x3b0
[   11.696027][   T68]  ? cleanup_net+0x932/0xa40
[   11.696252][   T68]  print_report+0xb4/0x270
[   11.696465][   T68]  ? kasan_addr_to_slab+0x25/0x80
[   11.696667][   T68]  kasan_report+0xbd/0xf0
[   11.696841][   T68]  ? cleanup_net+0x932/0xa40
[   11.697041][   T68]  cleanup_net+0x932/0xa40
[   11.697247][   T68]  ? __pfx_lock_acquire.part.0+0x10/0x10
[   11.697482][   T68]  ? __pfx_cleanup_net+0x10/0x10
[   11.697693][   T68]  ? trace_lock_acquire+0x148/0x1f0
[   11.697905][   T68]  ? lock_acquire+0x32/0xc0
[   11.698071][   T68]  ? process_one_work+0xe0b/0x16d0
[   11.698228][   T68]  process_one_work+0xe55/0x16d0
[   11.698380][   T68]  ? __pfx___lock_release+0x10/0x10
[   11.698578][   T68]  ? __pfx_process_one_work+0x10/0x10
[   11.698768][   T68]  ? assign_work+0x16c/0x240
[   11.698991][   T68]  worker_thread+0x58c/0xce0
[   11.699178][   T68]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   11.699373][   T68]  ? __pfx_worker_thread+0x10/0x10
[   11.699575][   T68]  ? __pfx_worker_thread+0x10/0x10
[   11.699761][   T68]  kthread+0x28a/0x350
[   11.699908][   T68]  ? __pfx_kthread+0x10/0x10
[   11.700058][   T68]  ret_from_fork+0x31/0x70
[   11.700205][   T68]  ? __pfx_kthread+0x10/0x10
[   11.700354][   T68]  ret_from_fork_asm+0x1a/0x30
[   11.700509][   T68]  </TASK>
[   11.700621][   T68] 
[   11.700707][   T68] Allocated by task 226:
[   11.700823][   T68]  kasan_save_stack+0x24/0x50
[   11.701011][   T68]  kasan_save_track+0x14/0x30
[   11.701153][   T68]  __kasan_slab_alloc+0x59/0x70
[   11.701327][   T68]  kmem_cache_alloc_noprof+0x10b/0x350
[   11.701493][   T68]  copy_net_ns+0xc6/0x340
[   11.701626][   T68]  create_new_namespaces+0x35f/0x920
[   11.701822][   T68]  unshare_nsproxy_namespaces+0x8d/0x130
[   11.702033][   T68]  ksys_unshare+0x2a9/0x660
[   11.702246][   T68]  __x64_sys_unshare+0x31/0x40
[   11.702460][   T68]  do_syscall_64+0xc1/0x1d0
[   11.702673][   T68]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   11.702940][   T68] 
[   11.703048][   T68] Freed by task 68:
[   11.703208][   T68]  kasan_save_stack+0x24/0x50
[   11.703424][   T68]  kasan_save_track+0x14/0x30
[   11.703638][   T68]  kasan_save_free_info+0x3b/0x60
[   11.703853][   T68]  __kasan_slab_free+0x38/0x50
[   11.704066][   T68]  kmem_cache_free+0xf8/0x330
[   11.704284][   T68]  cleanup_net+0x5a8/0xa40
[   11.704502][   T68]  process_one_work+0xe55/0x16d0
[   11.704714][   T68]  worker_thread+0x58c/0xce0
[   11.704911][   T68]  kthread+0x28a/0x350
[   11.705065][   T68]  ret_from_fork+0x31/0x70
[   11.705261][   T68]  ret_from_fork_asm+0x1a/0x30
[   11.705474][   T68] 
[   11.705575][   T68] The buggy address belongs to the object at ffff88800bcc0040
[   11.705575][   T68]  which belongs to the cache net_namespace of size 5696
[   11.706125][   T68] The buggy address is located 184 bytes inside of
[   11.706125][   T68]  freed 5696-byte region [ffff88800bcc0040, ffff88800bcc1680)
[   11.706612][   T68] 
[   11.706725][   T68] The buggy address belongs to the physical page:
[   11.706982][   T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bcc2fc0 pfn:0xbcc0
[   11.707407][   T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.707732][   T68] flags: 0x80000000000240(workingset|head|node=0|zone=1)
[   11.708003][   T68] page_type: f5(slab)
[   11.708195][   T68] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.708575][   T68] raw: ffff88800bcc2fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.708949][   T68] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088
[   11.709328][   T68] head: ffff88800bcc2fc0 0000000000050002 00000001f5000000 0000000000000000
[   11.709711][   T68] head: 0080000000000003 ffffea00002f3001 ffffffffffffffff 0000000000000000
[   11.710084][   T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
[   11.710473][   T68] page dumped because: kasan: bad access detected
[   11.710718][   T68] 
[   11.710825][   T68] Memory state around the buggy address:
[   11.711033][   T68]  ffff88800bcbff80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.711346][   T68]  ffff88800bcc0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   11.711644][   T68] >ffff88800bcc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.711946][   T68]                                                                 ^
[   11.712246][   T68]  ffff88800bcc0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.712551][   T68]  ffff88800bcc0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.712859][   T68] ==================================================================
[   11.713195][   T68] Disabling lock debugging due to kernel taint
[   12.049222][    C0] TCP: request_sock_TCP: Possible SYN flooding on port 10.0.254.1:7010. Sending cookies.